Improvement in the manufacture of gunpowder



emift i LOUIS HENRY GUSTAVUS EHRHABDT, OF LONDON, ENGLAND, ASSIGNOR TO-GEORGE B. UPTON, DAVID D. STAOKPOLE, AND SAMUEL H. GOOKIN.

: Letters Patent No. 85.576. January 5, 1869.

MROVEIEEN'I. IN THE MANUFACTURE OI GUNPOWDBR.

The Schedule referred to in these Letters Patentand making part of the lame.

- To all whom it may comm:

Be it known that I, LOUIS'HENBY Gnsmv'us EHR- HARDT, of London, England, have invented an Improved Gunpowder; and I do hereby declare the following to be a'full and correct descriptionlof the same.

In the specification of Letters. Patent, no. 55,795, granted to me, June 19, 1866, I described a'gunpov'vder made by the combination of four ingredients, viz, nitrate of potash and chlorate of potash, mixed with mineral carbon and cutch, or some equivalent vegetable sub-- stance.

1 The gunpowder which I now desire to secure by Letters Patent is an improvement on that described in the specification of the patent referred to. It consists of only two ingredients, viz, chlorate of potash,.mixed in proper proportions with a vegetable extract, such as cntch, gambier, logwood, or. the extracts of certain barks known in commerce as tan- 11in." Amixture ofthese extracts may be used, instead of any one of them.

To make this powder, the ingredients must be finely pulverized, and then intimately mixed. granulation or other preparation is required. The proportions best proportion I have found is of the chlorate and the extract. H v The powder thus compounded is specially adapted L. H. G. EHRHARDT. "Witnesses: Geo. E. LINCOLN,

Wm. Housm.

of the ingredients may 'be considerably varied, but the equal parts by weight to submarine and other blasting, but maybe used 

